I do not understand what you want to do exactly like dis Forums !!This was designed banner image like this section Graphic Design SectionThis is also Hitskin Support May help you !!Because I did not understand exactly what you want

You can't just find those themes on HitSkin, those are custom-made themes that have been customised using advanced coding and / or CSS. If you want a theme like those, you will need to make it yourself because they are not going to give you their CSS.